Morphology and surface topography of the schistosome Bivitellobilharzia nairi from the Asian elephant (Elephas maximus maximus) in Sri Lanka.
Morphology and surface topography of the schistosome Bivitellobilharzia nairi from the Asian elephant (Elephas maximus maximus) in Sri Lanka.
复制标题
斯里兰卡亚洲象 (Elephas maximus maximus) 血吸虫 Bivitellobilharzia nairi 的形态和表面形貌。
DOI：
10.1017/s0022149x12000417
复制
发表时间：
2012
影响因子：
1.6
通讯作者：
SM.Walker,Takeshi Agatsuma
中科院分区：
文献类型：
--
作者：
Jayanthe RPV. Rajapakse; Moritoshi Iwagami; S. Wickramasinghe;SM.Walker,Takeshi Agatsuma
Bivitellobilharzia Nairi最早是在柏林的一头印度象上记录的。这种寄生虫的感染在斯里兰卡的极大棘球绦虫种群中变得越来越重要。本工作是斯里兰卡血吸虫的首次形态描述。在斯里兰卡的皮纳瓦拉大象孤儿院附近，从一头死掉的亚洲象身上发现了一些成虫。观察到的感染大象的临床特征是消瘦、腹下水肿和贫血。尸检结果显示，肝脏肿大，肝实质血管内发现成虫。从肝脏的一部分中回收的蠕虫总数为129,870条，平均每100克肝脏有22条蠕虫。本研究使用光学显微镜和扫描电子显微镜(SEM)技术来研究这种寄生虫的形态和地形学特征，并与其他种类的血吸虫进行比较。在形态上，这些蠕虫很好地符合达特和斯里瓦斯塔瓦(1955)对B.Nairi的描述。此外，很明显，B.Nairi是一个独特的物种，很容易与其他血吸虫区分开来。扫描电子显微镜观察雄虫被层的扫描电子显微镜观察表明，奈氏不动杆菌的表面比其他血吸虫的表面光滑。
Bivitellobilharzia nairi was first recorded from an Indian elephant (Elephas maximus) in Berlin. Infections with this parasite have become increasingly important in E. maximus maximus populations in Sri Lanka. The present work is the first morphological description of this schistosome from Sri Lanka. A number of adult worms were recovered from a dead Asian elephant near the elephant orphanage, Pinnawala, in Sri Lanka. The observed clinical features of the infected elephant included emaciation, subventral oedema and anaemia. Post-mortem results indicated that the liver was enlarged and adult schistosomes were found in the blood vessels of the liver parenchyma. The total number of worms recovered from a portion of the liver was 129,870, which is an average of 22 worms per 100 g of liver. The present study uses both light microscopic and scanning electron microscope (SEM) techniques for the morphological and topographical characterization of this parasite and to permit comparison with other species of schistosomes. Morphologically, these worms correspond very well to the description of B. nairi by Dutt & Srivastava (1955). Moreover, it is clear that B. nairi is a distinctive species easily differentiated from other schistosomes. The SEM study of the tegument of male worms shows that the surface of B. nairi is smoother than in other schistosomes.